I am trying to establish pressure temperature chart for P92 / F92 material. This material has been in use for more than a decate but not listed under ASME Section II Part D, ASME B31.1 or ASME B31.3.
Please let me know if there is any publication for P92/F92 material which lists the yield...
Which piping code specifies the high temeperature limt of the following most common used bolting materials? (For valves to be used in ASME B31.3)
ASTM A193 B7, B7M, B8, B8M, B16 ..
ASTM A194 Grade 4, 7, 8, 8M, ..
Thanks
I have received a valve casting per ASTM A351-2003 grade CD4MCu. I performed Positive Identfication Inspection (PMI) and found all the elements meets the ASTM specification with exception of Mn%. Instead of max 1% Mn material that I received has Mn 1.5 % - 2%. Manganise should improve the...
I wondering why ASTM A182 F6 or A276/A479 Grade 410 material is not included in ASME B16.34 material list.
410 grade material has been used as stem material (Stem is also pressire retaining part)
Thanks
Dear Swall
I want to review as many as possible technical documentation about this subject so that I can come up with a reasonable solution (technically sound) for both the foundry and for me and for my customers. Otherwise foundry would tell me it is OK as it is , end-user will require to meet...
I am performing standard tensile test per A370
ASTM A703 stated product testing acceptance criteria shall be agreed between manufacturer and customer, but no tolerance is given.
I have been performing mechanical test on speciments from the actual product to verify mechanical properties of WCB cast parts. About 50% percent of the test results were lower than ASTM A216 WCB requirements. (within 10%)
I tested the foundry samples for the same heats and found all of them...
Nozzle Twister
I have talked some of the ASME B16 members and they believe 1000F limitation on some flanged materials are a editorial mistake. This limitation only applies to Class 150 flanges. (As you stated).
I think you should review your 1200 F to 1400 F FCC unit valves.
1)If the valves are...
I was wondering why there is 1000 F temperature limit on ASME B16.34 for flanged end-connections, but ASME B16.5 does not have 1000F temperature limitation. (Please see foot note on the material tables. Example material group 1.16)
Thanks
I am trying to calculate the pressure increase due to temperature increase of a fluid which is trapped in the pipiline under temerature increase. I know the P1 and T1, T2 and thermal expansion ratio of the fluid. Please let me know how to calculate the P2
Thanks
Commissioning means new pipeline, which has not only debris from the gas but also metal weld wire, weld debris, mud, stone from the pipeline fabrication.
Recommmendation to prevent seat leakage due to debris during commisioning;
Keep the valve in open position
Apply proper grease to the gap...
Usually other required cerification review, an ISO 9001 audit will give a good idea of the supplier.
As you mentioned, the design of the ball valves look similiar to each other, small details makes big difference on how the valve is going to perform. ( combination of material, design and...
if check valve installed close to the pump, or if they are not chooosen correctly, valve does not stay at fully open position and it oscillates.
This chattering or oscillation creates extra wear on the bearings and also it might cause damage on some of the mechanical connection.
Per ANSI/FCI70-2-1991 Class IV shut-off described as 0.01% of rated valve capacity. Test procedure A.
Valve capacity described as “the quantity of test fluid (air or water) that would pass through the valve at rated travel under the stated pressure conditions as determined by the appropriate...
there are many parameters that effects your sealing other than surface surface roughness such as form tolerances and also strrength of the material that you use. I f you give us more info about your design and how you have it ttested and failure .... I might be able to help you out.
